Magnetic separator



G. ULLRIC'H. MAGNETIC SEPARATOR.

APPLICATION FILED ocr. 8. 1914.

1 ,404,07 4, Patented Jan. 17, 1922,-

Iza/entere agay am UNITED STATES --ISATENT OFFICE..

GEORG ULLRCH, or MAGDEBURG, GERMANY, AssIGNoR, BYMEsNEAssIGNMENTs, 'ro

THECHEMICAL roUNnA'rroN rNc.,wA CORPORATION or DELAWARE.

MAGNETIC SEPARATOR.

y Specification of Letters Patent. Patented Jll, 17:, 51922,. Application filed October S, 1914. Serialy No. 865,707.1,5y

(GRANTED UNDER THE PROVISIONS orrnn Aer or MARGH a, 192'1,QA1' sur. `I..,- 1313.).

To all wlzo 1n t may concern Be it knownfthat I. Grone ULLRICII, englneer, subjectief the4 King of Bavaria, ,resid-V ing at Magdeburg, Germany, have invented certain new and useful Improvements in or Relating tov Magnetic .Separate-rs, for which Ihave filed application in Germany Oct. 9.0, 1918, in Holland Sept. 1914', and Austria Sept. 4l, 1914, and, of which theY following is a specification. i

Thisinvention relates to magnetic separators in which the material4 to'be treated is conducted through the field gap formed between the magnet and the pole situated above it. In the known separators of-this kind the conducting of the ma'vter'ialV to be treated is carried out in different ways. For instance, in my U. S. Patent No. 1,016,685 it consist-s of a continuousV conveying belt which runs over two rollers. At the middle, however, the upper and lower parts of the belt are brought together by means of guiding rollers, and these two contacting parts of the belt are situated in the field gap of the magnet. Considerable disadvantages are caused by the running of a so-constructed separator, the driving rollers and the two parts of the belt running in opposite direction consume considerable force, the belt will soon be worn out, and above all the important magnetic force is considerably weakened by the double thickness of4 the belt, and the consequent necessary enlargement of the field gap.

In case the construction of the separator permits it, the lower part of the belt is carried around the lower magnet as is the case in the British Patent No. 20,545 of 1906. The disadvantage caused by this, is that the machine has to be made comparatively large, because the belt rollers must Vbe given a greater diameter than the height of the magnet pole. The carrying of the belt around, is, however, not always possible. The cited British patent shows, furthermore, a device for carrying away the magnetically separated material, which comprises a drum, a body situated in the field gap and a second magnetic body situated thereabove. The two magnet poles in `this case constitute each a separate magnetic body. They are in no way connected, and the two magnetic bodies are, indeed, so far separted from each other that the drum is able to rotate between them. lVhen theupper magnet also excites thefi-ntermediate body, thev lower magnet andits' bodystill constitute two completely,, sepaf.,v rated members. This separation'has,how# ever, the great disadvantagey that the conductor of the lines ofy force becomesinterrupted, 'and that the magnetic force corresponding to the useful electric` energy, can only partly come into operation in thefield gap. In 'any case, it w-illf be. cons'iderably,A weakened.. Inaccordan'ce with this British patent, there is created between theup )er magnet and .the intermediarybody, anot fer field gap, whichby means of its magnetic influence on the 'conveying means, considerably retards the conveying movement". i

' All the enumerated disadvantages' 'which are to be found in known magnetic separators, are avoided in the present invention, which, moreover, makes it possible, by utilizing the same electrical and mechanical power, to make a machine of considerably smaller dimensions, which, nevertheless, produces a separating action of a strength which has hitherto been considered unattainable.

For this purpose, the magnetic member conducting the lines of force is provided with a window or passage, which has less width than'the magnetic member itself, so that on one or both sides of the window or the passage the iron of the magnetic membcr is left intact. The lines of force intended for operating the field gap are now conducted past the passages through this magnetic iron remaining on one or both sides of the passage. These lines of force will therefore not be interrupted and are able to operate with undiminished strength in the separting field gap, as the conveying portion of the belt for the material to be separated, is carried to the operating field gap, and the return portion of the belt through the passage of the magnet. The conducting rollers 0f the belt, as well as the entire machine, can consequently be constructed considerably smaller.

'A means for carrying the invention into effect is shown in the drawing. Fig. 1 shows a vertical section in the direction of the movement of the band, Fig. 2 shows a section across @h6 direction of movement of the conveying band; a

magnetic discharging body of any kind. Thematerial to be treated is conducted above thewlower pole f by means of the band e running over the rollers 0, al

The returning part of the band runs throughprovided with a passage W ich has less width than the magnetic body, leaving magnetizable material extendingpast said 'passage in order notto interrupt the lines of force intendedV for the field gap, a suitably guided conveying belt for the material to be treated,

. one portion ofV said belt passing through the field gap and another portion of the belt passing through said passage.

4Q 'A magnetic separator having a mag v netcbody conducting the lines of force and constituting the lower pole, an opposing pole forming a is an upper pole or field gap withsaid magnetic body, i

said magnetic body being provided with a passage through said lower pole leavingY magnetizable material extending past said passage, a suitably guided conveying belt for thematerial to be treated, one portion of said belt passing through the field gap and another portion of said belt passing through said passage, said passage being situated adjacent to said coil. A

3. A magnetic separator having a magnetic body conducting the lines of vforce and Y constituting the lower pole, an opposing pole forming the field gap with said magnetic body, said magnetic body being provided with a passage through said lower pole leaving magnetizable material extending past said passage, a suitably'guided conveying Y belt for the material to be treated, one portion of said belt passing through the field gap and another portion of the belt passing through said passage` one part lof said coil being situated above and another part vbelow said passage,

In testimony whereof the foregoing speciication is signed in the presence 'of two witnesses.

, Y GEORG ULLRlCH.

lVitnesses':1 p

OTTO.DORMANN,v AUGUST ENDERNANY. 

